1. HIT THE TARGET!

3. estimate fact family round compatible numbers inverse operations
Estimating a sum or difference by using the front digit of the number and substituting zeros for the other digits
estimate
fact family
A set of related multiplication and division, or addition and subtraction equations
round
compatible numbers
a number close to an exact amount
inverse operations
To replace a number with another that tells about how many or how much
are easy to compute mentally
front-end estimation

4. How could we use subtraction to find the missing addend?+
1ST ADDEND
2ND ADDEND =
SUM 4 10 + =
How could we use subtraction to find the missing addend? - = 10 6 4 + = 4 6 10

5. Relate addition and subtraction+ = 10 25 + = 7 15 - = 6 9

6. Problem page 32 Related facts Family facts
PRACTICE
Related facts
Family facts
4 , 5 , 7, 8
19, 20

8. , , 2 7 5 4 8 7 1 3 Round Whole Numbers Through Millions
Where should you look to round this place value?
What do you do when the digit to the right of the digit in the rounding place is 5 or greater?
What do you do if it is less than 5?

9. Round each number to the greatest place
1) ,5 6 7
2) 1 ,9 8 8
Problem Page 34
Exercises: 4, 5, 6

10. Practice Workbook
2.1 1,2,6,9,11,13,15
,4,5,8,10,12

11. Mental math strategies

12. 14 58 + 60 + 12
12+60=72

13. Base-ten blocks and break apart strategy
Why is it helpful to break apart numbers by place value?
Can this strategy work for subtraction? How?
Base-ten blocks and break apart strategy
45+37= = =

14. Book Page 42: Other strategies Friendly number strategy
GUIDED PRACTICE 2-5
Swapping
strategy

16. Use base-ten block to model the problem
All of the students in JuanCa’s class and Tommy’s class will receive ribbons on the last day of school. There are 200 students in JuanCa’s class and 654 in Tommy’s class.
Use base-ten block to model the problem
How can you find out how many ribbons will be needed for both classes?

17. Book page: 48 Guided Practice 2,5,6 3,4,5,8,17, 23 Homework
Practice WB 2.6
3,4,5,8,17, 23